html,body{
	margin: 0;
	padding: 0;
	width: 100%;
	height: 100%;
	white-space:nowrap;
}
#container{
	width: 100%;
	height: 100%;
	
	font-size: 12px;
	font-family: "微软雅黑";
	
	display: flex;
	flex-direction: column;
	
	align-items: center;
	justify-content: space-between;
}
.header,.footer,.container_main{width: 100%;}
.container_main{
	flex: 1;
	margin-top: 260px;
}